Untitled

3 :
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Page Title</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" type="text/css" media="screen" href="main.css" />
    <script src="main.js"></script>
</head>
<body>
    <?php
    $chaine="PHP5";
    for($i=0;$i<strlen($chaine);$i++){
        echo"$chaine[$i] <br>";
    }

    ?>
</body>
</html>
4 :
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Page Title</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" type="text/css" media="screen" href="main.css" />
    <script src="main.js"></script>
</head>
<body>
<?php
$adresse = array("hammamihoussem@gamil.com","lol@yahoo.com","charfe@hotmail.com");
foreach ($adresse as $key ) {
    echo substr(strstr($key,'@'), 1,strlen(strstr($key,'@')))."<br>";

}
?>
</body>
</html>